Quoting IAHFLYR (Reply 1):My guess is that you are seeing a difference in aircraft type, one being a B739 and the other being a B739ER! So I looked at your link and the seatguru clearly says it is an ER.

Well I looked at an 739ER seat map on CO.com also.

I wonder if anyone of you guys know which one shows the correct layout.

Quoting B747forever (Reply 6):Go on CO.com and search for flights from LAX to IAH on the 12th of August. Just pick the first 739 departure (at 1:25am from LAX) and look at the seat map.

Maybe I have it figured out, but then again maybe not!

It would seem the 900ER configuration shown in the link I pasted in from CO.com actually is the 900 configuration since it only shows 32 rows, while the flight you refer to actually may be an ER configuration since the 900ER has more rows.

Best advise I have to is to call CO Internet Tech Support at 800-300-1547 and ask them what the difference is from the flight you picked and the onboard ammenities, aircraft link.

Any views shared are strictly my own and do not a represent those of any former employer.